Stephen King
Brandon Sanderson
Orson Scott Card

Stephen King had the biggest impact on my style of writing because I voraciously read through most of his work from about 11 on.  Distinctly remember sitting in a laundromat, kicking my feet, reading the Richard Bachman book "Desperation"

His weird narrative stuff and tendency to address the reader stuck pretty well.  He sometimes uses a sort of third person omniscient perspective to tell the reader stuff that the character wouldn't know or that didn't occur during the timespan of the story.  Hell he sometimes even directly addresses the reader for a bit with lines like "and that, dear reader, was the last time that Will Light would ever play fetch with his dear best friend Blue."

Sanderson and Card I think influenced me in that they address their subjects with a gravity and realness not often seen elsewhere.  The Enders Game series and the Stormlight Archives series.  Man.  Go read the Stormlight Archives series.  The way it builds is incredible, I can't wait until the next one releases.